Personally I don't like #3 for two reasons. First the 400lb tongue weight limit would not work for me, and I cant imagine it will work for most TT + bike rack and bikes. Secondly, I feel it would impead with backing up, the bikes would contact the front of the TT.
I had a receiver welded to the rear. It's is a custom frame to frame welded 2" receiver. Works great, cost $295 from a specialty hitch shop near my home.
The only concern I had when i was investigating a front of TV mount was restricting air to the radiator. That and I didnt like the looks, but I could have gotten past looks if I was confident there wasnt going to be a cooling issue.
2007 Chevy Duramax LMM/Allison
2012 Jay Flight 29QBH
2012 Jay Flight 26BH (Sold)